
Positive brain awesome game. Suitable for adults and children. 6 puzzles per page. 250 CalcuDoku sudoku puzzles 7x7 easy levels. 250 CalcuDoku sudoku puzzles 7x7 medium levels. 250 CalcuDoku sudoku puzzles 7x7 hard levels. 252 CalcuDoku sudoku puzzles 7x7 extreme levels. Thick...